/**
 *  chdev.c - Related calls for char device driver
 *
 *  Copyright (C) 2008-2009 ZhangHu
 *  All rights reserved.
 *  E-MAIL: anmnmnly@gmail.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "drivers/chdev.h"



/**
 * chdevRegister - Register a device to Bycore.
 * @Mid: Main ID.
 * @Sid: Secondary ID.
 * @Name: Device name.
 * @Operation: Pointer to operations of device.
 * @return: DEV_OK if successful, otherwise reasons about failure.
 *
 * @notes:
 */
word_t chdevRegister(char_t Mid, char_t Sid,
                     const char_t *Name,
                     struct chdev_operations *Operation) {
    chdev_t *pchdev = NULL;
    word_t result = FALSE;

    if((Name == NULL) || (Operation == NULL)) {
        return DEV_FALSE;
    }

    if((pchdev = (chdev_t*)kmalloc(sizeof(chdev_t))) == NULL) {
        return DEV_NO_MEM;
    }

    pchdev->op = Operation;
    pchdev->loff = 0;
    result = char_device_register(&pchdev->dev, Name, Mid, Sid,
                                  Operation->release);

    if(result == DEV_FALSE) {
        kfree(pchdev);
    }

    return result;
}



/**
 * chdevUnRegister - Unregister a device from Bycore.
 * @Mid: Main ID.
 * @Sid: Secondary ID.
 *
 * @notes:
 */
void chdevUnRegister(uword_t chdevMID, uword_t chdevSID) {
    char_device_unregister(chdevMID, chdevSID);
}

